†Helminthoglypta (Helminthoglypta) talmadgei Roth 1988

Roth 1988. A new Recent species of Helminthoglypta (Gastropoda: Pulmonata) from the Klamath Mountains, California, and redescription of an Oligo-Miocene species from Oregon. Wasmann Journal of Biology, 45(1-2) 1988: 16-25